1321125325 has 12 divisors (see below), whose sum is σ = 1764210868. Its totient is φ = 975600000.

The previous prime is 1321125307. The next prime is 1321125341. The reversal of 1321125325 is 5235211231.

It can be written as a sum of positive squares in 6 ways, for example, as 63075364 + 1258049961 = 7942^2 + 35469^2 .

It is not a de Polignac number, because 1321125325 - 2⁹ = 1321124813 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321125325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2032176 + ... + 2032825.

Almost surely, 2^1321125325 is an apocalyptic number.

It is an amenable number.

1321125325 is a deficient number, since it is larger than the sum of its proper divisors (443085543).

1321125325 is a wasteful number, since it uses less digits than its factorization.

1321125325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065024 (or 4065019 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 1321125325 is about 36347.2877254961. The cubic root of 1321125325 is about 1097.2729487085.

Adding to 1321125325 its reverse (5235211231), we get a palindrome (6556336556).

The spelling of 1321125325 in words is "one billion, three hundred twenty-one million, one hundred twenty-five thousand, three hundred twenty-five".